31551143148 has 72 divisors (see below), whose sum is σ = 91651458080. Its totient is φ = 8964794880.

The previous prime is 31551143147. The next prime is 31551143153. The reversal of 31551143148 is 84134115513.

31551143148 is a `hidden beast` number, since 31 + 551 + 1 + 4 + 31 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31551143147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300253 + ... + 391476.

Almost surely, 2^31551143148 is an apocalyptic number.

It is an amenable number.

31551143148 is an abundant number, since it is smaller than the sum of its proper divisors (60100314932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31551143148 is a wasteful number, since it uses less digits than its factorization.

31551143148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691927 (or 691922 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 31551143148 in words is "thirty-one billion, five hundred fifty-one million, one hundred forty-three thousand, one hundred forty-eight".